I've confirmed that the power turns on and the games start, but I haven't checked if saving is possible or if there are any visual glitches. I don't know about the details beyond that. Tamagotchi and Mario's Picross have boxes and instructions. Puyo Puyo Tsu has a box and instructions, but is missing the inner case. The boxes, instructions, and cases are as shown in the photos and are old, so they have scratches and damage. As shown in the last photo, the two cartridges are loose without cases. Donkey Kong is Game Boy Color exclusive! These items have been stored for a long time, so I don't know when they might stop working. Please understand this before purchasing. m(__)m Also, if you're okay with shipping only the cartridges without the boxes to save on shipping costs, I can offer a discount. ^_^